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The influence of thermal expansion of unbonded foundry sands on the deformation of resin bonded cores
Jönköping University, School of Engineering, JTH, Materials and Manufacturing.
Jönköping University, School of Engineering, JTH, Materials and Manufacturing. Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.ORCID iD: 0000-0002-3024-9005
University Of Miskolc, Department of Foundry Technology, Miskolc, Hungary.
Jönköping University, School of Engineering, JTH, Materials and Manufacturing. Jönköping University, School of Engineering, JTH. Research area Materials and manufacturing – Casting.ORCID iD: 0000-0002-3644-213X
2017 (English)In: Archives of Metallurgy and Materials, ISSN 1733-3490, E-ISSN 2300-1909, Vol. 62, no 2, 795-798 p.Article in journal (Refereed) Published
Abstract [en]

Depending on the preparation and the applied materials, moulds and cores can be of high rigidity or can be flexible. Although, chemically bonded moulding materials have relatively good flexibility, their high temperature behaviour determines the dimensional accuracy, the stresses in the castings and can induce several casting defects, such as rattail, veining, etc. The phenomenon is based on two major effects: the thermal expansion of the unbonded foundry sands and the deformation of the sand mixtures. The main objective of the present work was to study the relationship between these two effects, and to improve the knowledge related to the thermo-mechanical interactions between the casting and the mould. Dilatometric analysis of unbonded sand samples were performed and compared to the results of hot distortion tests of moulding mixture specimens. The results showed, that the thermal expansion of foundry sand largely influences the hot distortion behaviour, but depending on the type of binder used.

Place, publisher, year, edition, pages
De Gruyter Open, 2017. Vol. 62, no 2, 795-798 p.
Keyword [en]
foundry sand, hot distortion, moulding material, phenolic resin, thermal expansion
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:hj:diva-36936DOI: 10.1515/amm-2017-0118ISI: 000406180900049Scopus ID: 2-s2.0-85026783797Local ID: JTHMaterialISOAI: oai:DiVA.org:hj-36936DiVA: diva2:1134511
Available from: 2017-08-21 Created: 2017-08-21 Last updated: 2017-08-21Bibliographically approved

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Diószegi, AttilaSvidró, József Tamás

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